Adventure Marathons
- 5 unique marathons on three different continents. Focusing on extreme elements such as high altitude, steep ascents, sand dunes, cold/frost or heat.
- http://www.adventure-marathon.com/

Jeremy's Eclectic Marathon Page
- Links to the web pages of a couple of hundred marathons around the world.
- http://pages.interlog.com/~jedward/marathon.html